Welded cable pulley

ABSTRACT

A welded cable pulley has two concentrically kinked disc-shaped rings, connected with each other along the kinking line with the outer surface forming the groove for the cable, and the inner surfaces forming two webs extending in the direction of the pulley hub. The weld connecting the disc-shaped rings along the kinking line is so dimensioned that it can be machined to suit the diameter of the respective cable, thus forming the cable groove. The kinked surfaces of the disc-shaped rings which form the cable groove are filled with weld metal and are given an outward curvature. The connection between the disc-shaped rings along the kinking line is effected by weld metal adapted to the strength of the cable pulley material. For the information of the cable groove and to provide the necessary machining allowance a weld metal is used which is adapted to the strength of the cable groove, and which is homogenously connected with the basic weld. The outer edges of the disc-shaped rings are given an outward curvature.

United States Patent [1 1 Habermann WELDED CABLE PULLEY Rudi Habermann,Kirchstrasse 58, D-4006 Erkrath near Duesseldorf,

[76] Inventor:

Primary Examiner-Leonard H. Gerin Attorney-Otto John Munz [57] ABSTRACTA welded cable pulley has two concentrically kinked disc-shaped rings,connected with each other along [451 Dec. 4, 1973 the kinking line withthe outer surface forming the groove for the cable, and the innersurfaces forming two webs extending in the direction of the pulley hub.

The weld connecting the disc-shaped rings along the kinking line is sodimensioned that it can be machined to suit the diameter of therespective cable, thus forming the cable groove.

The kinked surfaces of the disc-shaped rings which form the cable grooveare filled with weld metal and are given an outward curvature.

The connection between the disc-shaped rings along the kinking line isefl'ected by weld metal adapted to the strength of the cable pulleymaterial. For the information of the cable groove and to provide thenecessary machining allowance a weld metal is used which is adapted tothe strength of the cable groove, and which is homogenously connectedwith the basic weld.

The outer edges of the disc-shaped rings are given an outward curvature.

4 Claims, 2 Drawing Figures WELDED CAiiLE PULLEY FIELD oF INVENTIONClass 74 2303.

DESCRIPTION OF THE PRIOR ART On the known types of cable pulleys therims consist ing of angular or flat stock which is bent into the shapeof a ring is connected with the hub of the pulley by one or moredisc-shaped rings, with the inner edge welded to the hub and the outeredge welded to the rim. On other known types of cable pulleys made ofsteel the disc-shaped rings are often replaced by spokes.

Rims of cable pulleys which are made of angular or flat stock have thedisadvantage that they can only inaccurately be made to match arespective cable diameter. Therefore, the bearing surface for the cablerequires machining. However, during such machining it is generallyimpossible to avoid undue weakening of the profiled rim, especially incases where, due to inherent welding stresses, the rim exhibits aneccentricity or wobble and is no longer aligned with the bore of th hub.

SUMMARY OF THE INVENTION It is the object of the present invention toprovide a welded cable pulley which may generally be-very easilyproduced and which generally excellently fulfills, the requirements forwelded cable pulleys.

According to the present invention there is provided a cable pulleyconsisting of two concentrically kinked disc-shaped rings which arewelded together along the kinking line, with the outwardly facingsurfaces fonning the cable groove, and the inwardly facing surfacesforming the webs between the rim and the hub of the pulley.

According to another feature of this invention the welding seamconnecting the disc-shaped rings along the kinking line is sodimensioned that it can be machined to match the respective cablediameter, thus forming the cable groove.

So as to avoid upon the machining of the cable groove an unintentionalthinning of the walls of the disc-shaped rings, it is further proposedin accordance with this invention that an outwardly facing curvature isgiven to the surfaces of the disc-shaped rings forming the cable groove,the latter being filled with weld metal.

As it is the rule that the requirements in respect of the strength ofthe welding material used to connect the disc-shaped rings are lessstringent than those for the cable groove which is subjected toconsiderable wear by abrasive forces caused by the cable, the servicelife of uniformly welded cable pulleys is not always satisfactory,especially under rough operating conditions. In the case of smallercable pulleys this can be overcome by initially adapting the strengthrequirements for the cable groove to the strength of the bed of weldmetal which connects the disc-shaped rings and also forms the cablegroove.

In the case of cable pulleys with larger diameters and very voluminousweld metal fills with the required machining tolerances for the finaldimensioning of the cable groove, a uniform weld metal fill to providethe proper cable groove would increase the manufacturing costs for thecable pulleys to a non-justifiable extent.

In accordance with this invention it is proposed as a solution in suchcases that the connection of the discshaped rings along the kinking lineis effected by a weld metal matching the strength of the cable pulleymaterial, and that for the formation of the cable groove and to providethe necessary machining tolerance a weld metal is used, the strength ofwhich is in accordance with that of the cable groove, and which ishomogenously connected with the basic weld metal.

Finally, it is one of the characteristics of this invention that theoutermost edges of the disc-shaped rings are given an outwardly facingcurvature to protect the cable in the case of extending in a plane at anangle with the plane of rotation of the pulley.

DESCRIPTION OF THE PREFERRED EMBODIMENT One of the embodiments of thisinvention is illustrated by the accompanying drawing where FIG. 1 showsa cable pulley with a machined cable groove consisting of weld metal,with a cable resting in the groove, the top half representing asectional view,

' and the lower half representing a plan view, and

FIG. 2 is a section through a cable groove consisting of weld metals ofdifferent qualities.

The cable pulley consists of two concentrically kinked disc-shaped ringson which the outer surfaces 1 with their outward curvature form thegroove for the cable 2, whereas the inner surfaces 3 form the websbetween the rim and the cable pulley hub 4, the connection with thelatter being accomplished by welds 5. At the same time the cable groovewhich consists of weld metal 6 and can be machined to match therespective cable diameter, connects the disc-shaped rings along thekinking line 7 to form a cable pulley. On large diameter cable pulleysthe cable groove consists of the weld metal fill 8 to suit the cableoperating conditions, and the connecting weld 9 to suit the cable pulleystrength. For cable protection the outermost edges of the disc-shapedrings are rounded 10.

Whatl claim is:

l. A welded cable pulley comprising two concentrically kinkeddisc-shaped rings which are connected with'each other along the kinkingline, with the outer surfaces forming the groove for the cable, and theinner surfaces forming the webs extending in the direction of the pulleyhub, wherein the weld connecting the disc-shaped rings along the kinkingline is sodimensioned that it can be machined to suit the diameter ofthe respective cable, thus fonning the cable groove.

2. A welded cable pulley comprising ,two concentrically kinkeddisc-shaped rings which are connected with each other along the kinkingline, with the outer surfaces forming the groove for the cable, and theinner surfaces forming the webs extending in the direction of the pulleyhub, wherein the kinked surfaces of the disc-shaped rings which form thecable groove and are filled with weld metal are given an outwardcurvature.

3. A welded cable pulley comprising two concentrically kinkeddisc-shaped rings which are connected with each other along the kinkingline, with the outer surfaces forming the groove for the cable, and theinner surfaces forming the webs extending in the direction of the pulleyhub, wherein the connection between the disc-shaped rings along thekinking line is effected by weld metal adapted to the strength of thecable pulley material, and

with each other along the kinking line, with the outer surfaces formingthe groove for the cable, and the inner surfaces forming the websextending in the direction of the pulley hub, wherein the outer edges ofthe disc-shaped rings are given an outward curvature.

1. A welded cable pulley comprising two concentrically kinkeddisc-shaped rings which are connected with each other along the kinkingline, with the outer surfaces forming the groove for the cable, and theinner surfaces forming the webs extending in the direction of the pulleyhub, wherein the weld connecting the disc-shaped rings along the kinkingline is so dimensioned that it can be machined to suit the diameter ofthe respective cable, thus forming the cable groove.
 2. A welded cablepulley comprising two concentrically kinked disc-shaped rings which areconnected with each other along the kinking line, with the outersurfaces forming the groove for the cable, and the inner surfacesforming the webs extending in the direction of the pulley hub, whereinthe kinked surfaces of the disc-shaped rings which form the cable grooveand are filled with weld metal are given an outward curvature.
 3. Awelded cable pulley comprising two concentrically kinked disc-shapedrings which are connected with each other along the kinking line, withthe outer surfaces forming the groove for the cable, and the innersurfaces forming the webs extending in the direction of the pulley hub,wherein the connection between the disc-shaped rings along the kinkingline is effected by weld metal adapted to the strength of the cablepulley material, and wherein for the formation of the cable groove andto provide the necessary machining allo-ance a weld metal is used whichis adapted to the strength of the cable groove, and which ishomogeneously connected with the basic weld.
 4. A welded cable pulleycomprising two concentrically kinked disc-shaped rings which areconnected with each other along the kinking line, with the outersurfaces forming the groove for the cable, and the inner surfacesforming the webs extending in the direction of the pulley hub, whereinthe outer edges of the disc-shaped rings are given an outward curvature.